Freelance Session Border Controller Sbc Jobs in Virginia

Markon is seeking an experienced Expert Network Engineer with deep expertise in Voice over IP (VoIP) technologies to support an IC Customer in Herndon, VA. This role requires a strong background in network engineering, voice and video systems, and secure communications within complex enterprise environments. The ideal candidate will bring advanced technical knowledge, strong troubleshooting capabilities, and the ability to communicate effectively with both technical teams and senior government stakeholders. Responsibilities * Design, implement, and maintain enterprise voice and video communication systems * Engineer and support VoIP environments using protocols such as SIP, RTP, and H.323 * Design and optimize Local Area Networks (LAN) and Wide Area Networks (WAN) to support voice and video traffic * Apply Quality of Service (QoS) principles to ensure high-performance voice communications * Configure and troubleshoot routers, switches, firewalls, and VPN concentrators * Support secure voice architectures, including Session Border Controllers (SBCs), TLS encryption, and secure call routing * Integrate voice solutions with cloud platforms and hybrid environments * Perform advanced troubleshooting and traffic analysis using tools such as Wireshark * Collaborate within multidisciplinary teams to support mission requirements * Develop and deliver technical documentation, reports, and briefings * Present technical designs, concepts, and results to non-technical stakeholders and senior government personnel * Apply structured engineering design processes to develop innovative, mission-aligned solutions * Travel is required, up to 10% and is based on customer needs. This may be more of less than what is listed Qualifications Required: * Active TS/SCI w/ Full Scope Polygraph * Bachelor's degree in Computer Science or related field * 8+ Years of network engineering and administration experience, preferrably in remote access environments * Extensive experience in network engineering and VoIP systems design * Advanced knowledge of TCP/IP networking and QoS principles * Experience with PowerShell and understanding of scripting language formats Strong knowledge of virtualization products with a focus on Hyper-V. * Strong experience designing and implementing LAN/WAN architectures * Advanced experience engineering (not just implementing) voice and video technologies * Must have knowledge of VPN technologies to include OSPF, EIGRP, BGP, IP Multicasting * Hands-on experience with VoIP platforms such as Cisco, Asterisk, 3CX, or similar solutions * Experience configuring and troubleshooting network infrastructure components * Strong analytical and problem-solving skills * Excellent written and verbal communication skills Desired Qualifications * Experience supporting U.S. Government or secure enterprise environments * Experience with cloud-based voice integration * Knowledge of Cisco and PolyCom VTC technology * An ability to navigate and configure Linux operating systems * Familiarity with secure communications architectures and encryption standards * Relevant industry certifications (e.g., CCNP, CCIE, or Voice/Collaboration certifications) * Familiar with satellite and wireless communications Salary Range USD $180,000.00 - USD $210,000.00 /Yr. The Markon pay range for this position is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. Overview Eager to join a team where your skills are valued, your growth is nurtured, and your impact is profound? Look no further than Markon, a premier consulting firm deeply dedicated to advancing our nation's most critical missions. At Markon, we don't just offer jobs - we offer opportunities for personal and professional transformation. Empowering our employees to lead, innovate, and excel, we foster an environment where new ideas are not just welcomed but celebrated. As a perennial Washington Post Top Workplace, we prioritize the well-being and success of our team members, ensuring they can bring their best selves to work. Headquartered in Falls Church, Virginia, Markon has garnered national recognition for our unwavering dedication to excellence in serving the intelligence community, as well as federal civilian and defense agencies. Our growing reach extends across 17 states, 116 countries, and 5 continents, where our team of dynamic professionals collaborates to deliver unparalleled program and project management services. Markon values people and the tremendous impact each individual can make - which is why we're consistently recognized as one of the best places to work in federal government consulting. Here, you can help solve the nation's most important challenges, surrounded by colleagues who help you grow, advance, and succeed. We are deeply dedicated to what matters - bringing out the best in each other to advance our clients' missions. Join us and make a meaningful impact. Markon is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, national origin, age, protected veteran status, or disability status. This job posting will remain open until the position is filled. Benefits Offered : Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Training and Tuition Assistance, Paid Time Off, and Holidays